DataMember.cs source code in C# .NET

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Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / cdf / src / WCF / Serialization / System / Runtime / Serialization / DataMember.cs / 1305376 / DataMember.cs
                        

                        
                            //------------------------------------------------------------------------------ 
// Copyright (c) Microsoft Corporation.  All rights reserved.
//-----------------------------------------------------------------------------
namespace System.Runtime.Serialization
{ 
    using System;
    using System.Collections.Generic; 
    using System.Reflection; 
    using System.Security;
 
    class DataMember
    {
        [Fx.Tag.SecurityNote(Critical = "Holds instance of CriticalHelper which keeps state that is cached statically for serialization."
            + " Static fields are marked SecurityCritical or readonly to prevent data from being modified or leaked to other components in appdomain.")] 
        [SecurityCritical]
        CriticalHelper helper; 
 
        [Fx.Tag.SecurityNote(Critical = "Initializes SecurityCritical field 'helper'.",
            Safe = "Doesn't leak anything.")] 
        [SecuritySafeCritical]
        internal DataMember()
        {
            helper = new CriticalHelper(); 
        }
 
        [Fx.Tag.SecurityNote(Critical = "Initializes SecurityCritical field 'helper'.", 
            Safe = "Doesn't leak anything.")]
        [SecuritySafeCritical] 
        internal DataMember(MemberInfo memberInfo)
        {
            helper = new CriticalHelper(memberInfo);
        } 

        [Fx.Tag.SecurityNote(Critical = "Initializes SecurityCritical field 'helper'.", 
            Safe = "Doesn't leak anything.")] 
        [SecuritySafeCritical]
        internal DataMember(string name) 
        {
            helper = new CriticalHelper(name);
        }
 
        [Fx.Tag.SecurityNote(Critical = "Initializes SecurityCritical field 'helper'.",
            Safe = "Doesn't leak anything.")] 
        [SecuritySafeCritical] 
        internal DataMember(DataContract memberTypeContract, string name, bool isNullable, bool isRequired, bool emitDefaultValue, int order)
        { 
            helper = new CriticalHelper(memberTypeContract, name, isNullable, isRequired, emitDefaultValue, order);
        }

        internal MemberInfo MemberInfo 
        {
            [SecuritySafeCritical] 
            get { return helper.MemberInfo; } 
        }
 
        internal string Name
        {
            [SecuritySafeCritical]
            get { return helper.Name; } 
            [SecurityCritical]
            set  { helper.Name = value; } 
        } 

        internal int Order 
        {
            [SecuritySafeCritical]
            get { return helper.Order; }
            [SecurityCritical] 
            set { helper.Order = value; }
        } 
 
        internal bool IsRequired
        { 
            [SecuritySafeCritical]
            get { return helper.IsRequired; }
            [SecurityCritical]
            set { helper.IsRequired = value; } 
        }
 
        internal bool EmitDefaultValue 
        {
            [SecuritySafeCritical] 
            get { return helper.EmitDefaultValue; }
            [SecurityCritical]
            set { helper.EmitDefaultValue = value; }
        } 

        internal bool IsNullable 
        { 
            [SecuritySafeCritical]
            get { return helper.IsNullable; } 
            [SecurityCritical]
            set { helper.IsNullable = value; }
        }
 
        internal bool IsGetOnlyCollection
        { 
            [SecuritySafeCritical] 
            get { return helper.IsGetOnlyCollection; }
            [SecurityCritical] 
            set { helper.IsGetOnlyCollection = value; }
        }

        internal Type MemberType 
        {
            [SecuritySafeCritical] 
            get { return helper.MemberType; } 
        }
 
        internal DataContract MemberTypeContract
        {
            [SecuritySafeCritical]
            get { return helper.MemberTypeContract; } 
            [SecurityCritical]
            set { helper.MemberTypeContract = value; } 
        } 

        internal bool HasConflictingNameAndType 
        {
            [SecuritySafeCritical]
            get { return helper.HasConflictingNameAndType; }
            [SecurityCritical] 
            set { helper.HasConflictingNameAndType = value; }
        } 
 
        internal DataMember ConflictingMember
        { 
            [SecuritySafeCritical]
            get { return helper.ConflictingMember; }
            [SecurityCritical]
            set { helper.ConflictingMember = value; } 
        }
 
        [Fx.Tag.SecurityNote(Critical = "Critical.")] 
        [SecurityCritical(SecurityCriticalScope.Everything)]
        class CriticalHelper 
        {
            DataContract memberTypeContract;
            string name;
            int order; 
            bool isRequired;
            bool emitDefaultValue; 
            bool isNullable; 
            bool isGetOnlyCollection = false;
            MemberInfo memberInfo; 
            bool hasConflictingNameAndType;
            DataMember conflictingMember;

            internal CriticalHelper() 
            {
                this.emitDefaultValue = Globals.DefaultEmitDefaultValue; 
            } 

            internal CriticalHelper(MemberInfo memberInfo) 
            {
                this.emitDefaultValue = Globals.DefaultEmitDefaultValue;
                this.memberInfo = memberInfo;
            } 

            internal CriticalHelper(string name) 
            { 
                this.Name = name;
            } 

            internal CriticalHelper(DataContract memberTypeContract, string name, bool isNullable, bool isRequired, bool emitDefaultValue, int order)
            {
                this.MemberTypeContract = memberTypeContract; 
                this.Name = name;
                this.IsNullable = isNullable; 
                this.IsRequired = isRequired; 
                this.EmitDefaultValue = emitDefaultValue;
                this.Order = order; 
            }

            internal MemberInfo MemberInfo
            { 
                get { return memberInfo; }
            } 
 
            internal string Name
            { 
                get { return name; }
                set { name = value; }
            }
 
            internal int Order
            { 
                get { return order; } 
                set { order = value; }
            } 

            internal bool IsRequired
            {
                get { return isRequired; } 
                set { isRequired = value; }
            } 
 
            internal bool EmitDefaultValue
            { 
                get { return emitDefaultValue; }
                set { emitDefaultValue = value; }
            }
 
            internal bool IsNullable
            { 
                get { return isNullable; } 
                set { isNullable = value; }
            } 

            internal bool IsGetOnlyCollection
            {
                get { return isGetOnlyCollection; } 
                set { isGetOnlyCollection = value; }
            } 
 
            internal Type MemberType
            { 
                get
                {
                    FieldInfo field = MemberInfo as FieldInfo;
                    if (field != null) 
                        return field.FieldType;
                    return ((PropertyInfo)MemberInfo).PropertyType; 
                } 
            }
 
            internal DataContract MemberTypeContract
            {
                get
                { 
                    if (memberTypeContract == null)
                    { 
                        if (MemberInfo != null) 
                        {
                            if (this.IsGetOnlyCollection) 
                            {
                                memberTypeContract = DataContract.GetGetOnlyCollectionDataContract(DataContract.GetId(MemberType.TypeHandle), MemberType.TypeHandle, MemberType, SerializationMode.SharedContract);
                            }
                            else 
                            {
                                memberTypeContract = DataContract.GetDataContract(MemberType); 
                            } 
                        }
                    } 
                    return memberTypeContract;
                }
                set
                { 
                    memberTypeContract = value;
                } 
            } 

            internal bool HasConflictingNameAndType 
            {
                get { return this.hasConflictingNameAndType; }
                set { this.hasConflictingNameAndType = value; }
            } 

            internal DataMember ConflictingMember 
            { 
                get { return this.conflictingMember; }
                set { this.conflictingMember = value; } 
            }
        }

        [Fx.Tag.SecurityNote(Miscellaneous = "RequiresReview - checks member visibility to calculate if access to it requires MemberAccessPermission for serialization." 
            + " Since this information is used to determine whether to give the generated code access"
            + " permissions to private members, any changes to the logic should be reviewed.")] 
        internal bool RequiresMemberAccessForGet() 
        {
            MemberInfo memberInfo = MemberInfo; 
            FieldInfo field = memberInfo as FieldInfo;
            if (field != null)
            {
                return DataContract.FieldRequiresMemberAccess(field); 
            }
            else 
            { 
                PropertyInfo property = (PropertyInfo)memberInfo;
                MethodInfo getMethod = property.GetGetMethod(true /*nonPublic*/); 
                if (getMethod != null)
                    return DataContract.MethodRequiresMemberAccess(getMethod) || !DataContract.IsTypeVisible(property.PropertyType);
            }
            return false; 
        }
 
        [Fx.Tag.SecurityNote(Miscellaneous = "RequiresReview - checks member visibility to calculate if access to it requires MemberAccessPermission for deserialization." 
            + " Since this information is used to determine whether to give the generated code access"
            + " permissions to private members, any changes to the logic should be reviewed.")] 
        internal bool RequiresMemberAccessForSet()
        {
            MemberInfo memberInfo = MemberInfo;
            FieldInfo field = memberInfo as FieldInfo; 
            if (field != null)
            { 
                return DataContract.FieldRequiresMemberAccess(field); 
            }
            else 
            {
                PropertyInfo property = (PropertyInfo)memberInfo;
                MethodInfo setMethod = property.GetSetMethod(true /*nonPublic*/);
                if (setMethod != null) 
                    return DataContract.MethodRequiresMemberAccess(setMethod) || !DataContract.IsTypeVisible(property.PropertyType);
            } 
            return false; 
        }
 
        internal DataMember BindGenericParameters(DataContract[] paramContracts, Dictionary boundContracts)
        {
            DataContract memberTypeContract = this.MemberTypeContract.BindGenericParameters(paramContracts, boundContracts);
            DataMember boundDataMember = new DataMember(memberTypeContract, 
                this.Name,
                !memberTypeContract.IsValueType, 
                this.IsRequired, 
                this.EmitDefaultValue,
                this.Order); 
            return boundDataMember;
        }

        internal bool Equals(object other, Dictionary checkedContracts) 
        {
            if ((object) this == other) 
                return true; 

            DataMember dataMember = other as DataMember; 
            if (dataMember != null)
            {
                // Note: comparison does not use Order hint since it influences element order but does not specify exact order
                bool thisIsNullable = (MemberTypeContract == null) ? false : !MemberTypeContract.IsValueType; 
                bool dataMemberIsNullable = (dataMember.MemberTypeContract == null) ? false : !dataMember.MemberTypeContract.IsValueType;
                return (Name == dataMember.Name 
                        && (IsNullable || thisIsNullable) == (dataMember.IsNullable || dataMemberIsNullable) 
                        && IsRequired == dataMember.IsRequired
                        && EmitDefaultValue == dataMember.EmitDefaultValue 
                        && MemberTypeContract.Equals(dataMember.MemberTypeContract, checkedContracts));
            }
            return false;
        } 

        public override int GetHashCode() 
        { 
            return base.GetHashCode();
        } 
    }
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.

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